During the most recent decades the utilization of (otherwise) waste materials and biomass as alternative fuels in the cement industry and power plants showed great growth figures. However, the low heat values of alternative fuels require larger handling and storage systems that are more flexible. This article shows, how these materials can be handled.
Pietro de Michieli
(ed. wgeisler - 21/2/2017)
The alternative fuels arrive via semi-truck and are loaded onto a surface feeder to an optional double roller crusher for sizing of the fuels, if required. From there, the fuels travel via belt conveyor to a tripper/stacker to properly build the 9 piles of fuel. A total of 50,000 tons of fuel are housed within the storage hall.
Given the diversity of moisture within the fuels, a bucket-type portal reclaimer was determined to be the most effective for the duty. As is our standard, we prefer to utilize a bucket-type reclaimer when the moisture is in excess of 12%. In the case of this project, the fuels require minimal mixing and our reclaimer affords quick pile changes. Bedeschi supply to include:
Surface Feeder CNT 14/2500
Double Roller Crusher Type RL 450/1500 (optional)
Stacker Type STK 22/800
Reclaimer Type BEL P 250/30+4
Belt Conveyors NG: 800/584 , 800/507, 650/104, 650/269
Portal reclaimer BEL P from Bedeschi, as installed in the middle east cement plant
Gob as a Fuel
Gob is a waste coal that is the low-energy discards of the coal mining industry. These waste coal piles accumulated mostly between 1900 and 1970 in western Pennsylvania, West Virginia and Kentucky . These piles can contain millions of tons of low calorific value fuel that can potentially be recovered and processed in coal fired power plants or other energy intensive pyro-processing systems. The Virginia City hybrid energy center is just one example. The 585 megawatt coal-fired power plant will be generating electricity from millions of tons of waste coal that was not previously marketable . See Table 3.